DE19905431A1 - Process for the transmission of location-related information - Google Patents

Abstract

In a method for transmitting location-related information between a navigation device which contains a first location database, in which coordinate pairs of the locations and descriptors are assigned to the location information, and a receiver for digitally coded traffic reports, which contains a second location database, and with a receiver and a navigation device stores, in addition to the description, coordinate pairs of the locations in the second location database for the location information contained therein. At least the coordinate pair of the location to which the information relates is transmitted with the information to be transmitted. With the help of at least the transmitted pair of coordinates, the location information is read from the respective location database.

Description

The invention relates to a method for transferring to Place related information between one Navigation device that a first location database contains the coordinate pairs of the locations and Descriptors are assigned to the location information, and one Receiver for digitally coded traffic reports, the one contains second location database, and one for implementation of the procedure suitable recipient and a Navigation device.

In motor vehicles, electronic devices are becoming increasingly popular Devices used that convey information to the driver. To guide the driver to a chosen destination are Navigational devices have become known, based on a digital road map and sensors to determine the respective location of the vehicle, for example Satellite tracking devices, the cheapest route to Target is calculated and the driver receives appropriate information are given. The so-called digital Road map filed in a location database - in the following also called map database - in which the for  Route guidance necessary places with their geographical Coordinates are stored.

To inform the driver about traffic delays various traffic radio systems have become known. To belongs to the TMC system, in which digitally coded Traffic reports generated by the sender and in receivers be decoded. Details of this are described in EP 0 263 332 B1, DE 38 10 177 A1 and DE 38 10 179 A1.

For decoding these digitally coded traffic reports at least one location database is required in the receiver, at which selected locations sorted by street are listed - for example junctions and Crossroads.

The navigation devices of different manufacturers show however different data formats and references within the map databases. This is a Exchange information about a specific place between different systems impossible. So that Navigation devices are mutually compatible in so far are and from a service provider who maintains the card databases updated, can be addressed, is currently on a project of the European Commission - EVIDENCE called - worked, in which an ILOC process (ILOC = intersection location) is proposed. These suggestions however, do not result in digitally encoded Traffic reports without manual entry in the known Navigation facilities can be taken into account.

The object of the invention is therefore to exchange on Place related information between one Navigation device and a receiver for digital to enable coded traffic reports.  

This task is solved by

• - That in the second location database to those contained therein Location information except descriptors coordinate pairs of the locations are filed,
• - That with the information to be transmitted at least that Coordinate pair of the place is transferred to the Information related, and
• - That with the help of at least the transferred Coordinates from the respective location database Location information is read out.

Received can by the inventive method digital traffic reports from the receiver to one Navigation device are transmitted so that for example determined by the navigation device Route recommendations according to any that occur Traffic incidents can be changed automatically or previously received and saved traffic reports Recalculation of a route will be considered.

The method according to the invention can also be used to: a navigation device to a receiver for digital to transmit coded traffic reports information for example, using the coordinates by approximation and comparing the descriptors of the associated location in the TMC system can be found in the table and used for this to be at a receiver for digital Traffic announcements - hereinafter also called TMC receivers - to create a message and by voice to the user to communicate. In addition, from the navigation device the respective location can be sent to the TMC receiver, in order to select received traffic reports to be used.  

Even if the coordinate pairs follow the same norm, for example WGS84, it may be due to their different source to slight deviations come. In addition, the TMC system and the Navigation devices defined the locations differently. It is therefore a further development of the invention Method provided that for reading coordinate pairs of respective location database used within a tolerance range of the transmitted coordinate pairs lie.

The specification of the coordinate pair is not for all locations clearly. For example, point at different levels lying places, i.e. those on and under a bridge, the same pair of coordinates, but must be in the respective System can be distinguished. To rule out errors here, is in another development of the invention Procedure provided that with the information further Descriptors are transferred using if appropriate existing similar descriptors in the respective Location database can be compared. In particular, the transmitted descriptors street numbers and / or Branch numbers.

Traffic reports that are not related to the motorway can a clear location cannot always be assigned. In in this case a so-called LLOC (link location) created, with the transferred descriptors the endpoints of a street segment.

Advantageous embodiments of the invention Procedures are given in that the information from Receive receiver and to the navigation device transmitted or that the information from the Navigation device to the receiver for digitally coded Traffic announcements are transmitted.  

The object of the invention is for a recipient digitally coded traffic reports solved by a Device for the transmission of location-related Information between a navigation device that contains a first location database, in which Coordinate pairs of locations and descriptors. Location information are assigned, and the recipient who has a second Includes location database, being in the second location database the location information contained therein, except for descriptors Coordinate pairs of the places are stored and with the to transmitting information at least the coordinate pair is transferable to the location to which the information relates are, and with which from the respective location database Location can be read out.

A navigation device according to the invention, the first Location database contains at which coordinate pairs the locations and descriptors are assigned to the location information characterized by a device for the transmission of information related to locations between the Navigation device and a receiver for digital encoded traffic reports that a second location database contains, in which to the location information contained therein apart from descriptors, coordinate pairs of the locations are stored, with at least the information to be transmitted Coordinate pair of the place is transferable to which the Information related, and with the help of the the location information can be read from the respective location database.

Embodiments of the invention are in the drawing represented with several figures and in the following Description explained in more detail. It shows:  

Fig. 1 shows schematically a connection between a navigation device and a receiver for digitally coded traffic messages,

Fig. 2 is a crossroads,

Fig. 3 is a coding of the location of this intersection for a navigation device and

Fig. 4 is a coding of the same location for a TMC receiver.

Of a navigation device 1 and a TMC receiver 2 , the parts required for understanding the invention are shown only schematically in FIG. 1. The navigation device 1 contains a locating device, for example a GPS receiver 3 , and a drive 4 with a CD-ROM 5 on which the map database is stored. A microcomputer 6 is used, among other things, to calculate the travel routes and to generate the travel recommendations required in each case, for example "turn right", which can be shown on a display 7 or - which is not shown - can be output via speech synthesis and loudspeakers.

The receiver 2 has a receiving part 8 , a microcomputer 9 and a memory 10 , which is used, among other things, for storing the location database. The TMC receiver 2 also has an output device, for example a display 11 . This is used to display the received and decoded traffic reports in addition to other information, for example the selected station.

The microcomputers 6 , 9 are connected to one another via a data line 12 using corresponding interfaces known per se, so that information can be exchanged in accordance with the invention.

In the example shown in FIGS. 2 to 4, information is to be transmitted which relates to the junction 61 of the A7 motorway shown in FIG. 2. The junction connects the federal road B494 with the A7 motorway and has the coordinate pair shown in FIG. 2 both in conventional angular units and in decimal.

FIG. 3 shows the coding of the connection point according to ILOC, the two coordinates initially being indicated with a plus sign in front, followed by the two roads which intersect at the connection point and then the connection point itself.

FIG. 4 shows a line from a location database for TMC messages in accordance with the ALERT standard EN12313-1. A location code for the connection point shown in FIG. 2 is followed by the street number, namely A7, and then the first name. Other names are possible according to the ALERT standard, but are not shown here. Then another location code follows as "negative offset", which means the previous connection point, and as "positive offset" the following connection point. Finally, the number of junction 61 is given. For a compatible transmission of data to or from a navigation device, the location database also contains a pair of coordinates per location code according to WGS84.

Claims (9)

1. A method for transmitting location-related information between a navigation device that contains a first location database, in which coordinate pairs of the locations and descriptors are assigned to the location information, and a receiver for digitally coded traffic reports that contains a second location database, characterized in that

• - that, in addition to descriptors, coordinate pairs of the locations are stored in the second location database for the location information contained therein,
• - That with the information to be transmitted at least the coordinate pair of the place to which the information is related, and
• - That the location information is read out from the respective location database with the help of at least the transmitted coordinate pair.

2. The method according to claim 1, characterized in that for reading out coordinate pairs of the respective location database used within a tolerance range of transmitted coordinate pairs lie. 3. The method according to any one of claims 1 or 2, characterized characterized that with the information further Descriptors are transferred using if appropriate existing similar descriptors in the respective Location database can be compared.   4. The method according to claim 3, characterized in that the transmitted descriptors street numbers and / or Branch numbers are. 5. The method according to any one of the preceding claims, characterized in that the transmitted descriptors are the end points of a street segment. 6. The method according to any one of the preceding claims, characterized in that the information is received by the receiver ( 2 ) and transmitted to the navigation device ( 1 ). 7. The method according to any one of claims 1 to 5, characterized in that the information from the navigation device ( 1 ) to the receiver ( 2 ) for digitally coded traffic reports are transmitted. 8. Receiver for digitally coded traffic reports, characterized by a device for the transmission of location-related information between a Navigation device that a first location database contains the coordinate pairs of the locations and Descriptors are assigned to the location information, and the Receiver that contains a second location database, where in the second location database to those contained therein Location information except descriptors coordinate pairs of the locations are filed and with those to be transferred Information at least the coordinate pair of the place is transferable to which the information relates and with the location information from the respective location database is readable. 9. Navigation device, which is a first location database contains the coordinate pairs of the locations and Descriptors are assigned to the location information  through a device for transferring to places related information between the navigation device and a receiver for digitally coded traffic reports, which contains a second location database in which to the location information contained therein, except for descriptors Coordinate pairs of the locations are stored, with the to transmitting information at least the coordinate pair is transferable to the location to which the information relates and with the help of the respective location database the location can be read.